<template>
  <div class="login-wrapper">
    <el-form
      ref="loginForm"
      :model="form"
      :rules="rules"
      class="login-form ele-bg-white"
      size="large"
      @keyup.enter.native="doSubmit"
    >
      <h4>用户登录</h4>
      <el-form-item prop="username">
        <el-input v-model="form.username" placeholder="请输入登录账号" prefix-icon="el-icon-user" clearable />
      </el-form-item>
      <el-form-item prop="password">
        <el-input v-model="form.password" placeholder="请输入登录密码" prefix-icon="el-icon-lock" show-password />
      </el-form-item>
      <el-form-item prop="captcha_1">
        <div class="login-input-group">
          <el-input v-model="form.captcha_1" placeholder="请输入验证码" prefix-icon="el-icon-_vercode" />
          <img v-if="pic" :src="pic" class="login-captcha" alt="" @click="_getCaptcha">
        </div>
      </el-form-item>
      <div class="el-form-item">
        <el-button :loading="loading" type="primary" class="login-btn" size="large" @click="doSubmit">
          {{ loading ? '登录中' : '登录' }}
        </el-button>
      </div>
    </el-form>
    <div class="login-copyright">copyright © 2020 MIT <router-link to="/admin" class="login-admin">管理后台</router-link></div>
  </div>
</template>

<script>
import { getCaptcha } from '@/api/public'
export default {
  name: 'Login',
  data() {
    return {
      loading: false, // 加载状态
      form: { username: '', password: '', captcha_0: '', captcha_1: '' }, // 表单数据
      rules: { // 表单验证规则
        username: [
          { required: true, message: '请输入账号', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' }
        ],
        captcha_1: [
          { required: true, message: '请输入验证码', trigger: 'blur' }
        ]
      },
      text: '',
      pic: ''
    }
  },
  mounted() {
    if (this.$store.state.user.token) this.$router.push(this.$route.query.from || '/')
    this._getCaptcha()
  },
  methods: {
    /* 提交 */
    doSubmit() {
      this.$refs['loginForm'].validate((valid) => {
        if (!valid) return false
        this.loading = true
        this.$http.post('/rbac/login/', this.form).then((res) => {
          this.loading = false
          if (res.data.code === 0) {
            this.$message({ type: 'success', message: '登录成功' })
            this.$store.dispatch('user/setToken', 'JWT ' + res.data.data.access_token).then(() => {
              this.$router.push(this.$route.query.from || '/').catch(() => {
              })
            })
          } else {
            this.$message.error(res.data.msg)
            this._getCaptcha()
          }
        })
      })
    },
    /* 获得验证码 */
    _getCaptcha() {
      getCaptcha().then(res => {
        const data = res.data
        this.form.captcha_0 = data.key
        this.pic = data.image_url
      })
    }
  }
}
</script>

<style scoped>
.login-wrapper {
  padding: 50px 20px;
  position: relative;
  box-sizing: border-box;
  background-image: url("~@/assets/bg-login.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  min-height: 100vh;
}

.login-wrapper:before {
  content: "";
  background-color: rgba(0, 0, 0, .2);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.login-form {
  margin: 0 auto;
  width: 360px;
  max-width: 100%;
  padding: 25px 30px;
  position: relative;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
  box-sizing: border-box;
  border-radius: 4px;
  z-index: 2;
}

.login-form h4 {
  text-align: center;
  margin: 0 0 25px 0;
}

.login-form > .el-form-item {
  margin-bottom: 25px;
}

.login-input-group {
  display: flex;
  align-items: center;
}

.login-input-group >>> .el-input {
  flex: 1;
}

.login-captcha {
  height: 38px;
  width: 102px;
  margin-left: 10px;
  border-radius: 4px;
  border: 1px solid #DCDFE6;
  text-align: center;
  cursor: pointer;
}

.login-captcha:hover {
  opacity: .75;
}

.login-btn {
  display: block;
  width: 100%;
}

.login-oauth-icon {
  color: #FFF;
  padding: 5px;
  margin: 0 10px;
  font-size: 18px;
  border-radius: 50%;
  cursor: pointer;
}

.login-copyright {
  color: #eee;
  padding-top: 20px;
  text-align: center;
  position: relative;
  z-index: 1;
}

@media screen and (min-height: 550px) {
  .login-form {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: -250px;
  }

  .login-copyright {
    position: absolute;
    bottom: 20px;
    right: 0;
    left: 0;
  }

  .login-admin{
    cursor:pointer;
    text-decoration:none;
    color:#eee;
  }
  .login-admin:hover{
    color:#ddd;
  }
}
</style>
